C64 dumping

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BarryB
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Re: C64 dumping

Post by BarryB » Tue Apr 22, 2014 10:45 pm

Seems the Ultima IV dump now works in WinVICE and also written back to disk in a real 1541.

What is the correct flag for dumping Cyan Loader and XEMAG? I have Infiltrator (flippy disk) with Cyan Signature on track 40 Side 0 and Koronis Rift (Xemag) and just dumped with -i6, converted to G64 and wrote back to disk (all tracks Verify OK) and only Koronis Rift loads on a real 1541 (identified as XEMAG when converting to G64), Infiltrator just crashes with Cyan border and resets.

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IFW
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Re: C64 dumping

Post by IFW » Tue Apr 22, 2014 10:57 pm

-i6
You may want to retry booting the cyan loader disk - it's not very reliable.

BarryB
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Re: C64 dumping

Post by BarryB » Tue Apr 22, 2014 11:58 pm

Thanks, so -i6 was correct!

Have found out it's Jiffydos on the 1541 stopping it loading, tried the original and it did the same so flicked the jiffydos switch, reloaded and now loads fine! Must check for modified ROM in the 1541? Doesn't seem to care if jiffydos is enabled or not on the C64 itself though! So have managed to create working copies of all my disks so far, pretty pleased with that!

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IFW
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Re: C64 dumping

Post by IFW » Wed Apr 23, 2014 10:24 am

Don't forget to submit them eventually ;)

BarryB
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Re: C64 dumping

Post by BarryB » Wed Apr 23, 2014 5:29 pm

I will submit dumps, just getting used to C64 dumping! When dumping for submission, should I dump all disks using the flippy mode parameters even if the disk only uses 1 side?

Rakki
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Location: Jyväskylä, Finland

Re: C64 dumping

Post by Rakki » Wed Apr 23, 2014 7:32 pm

BarryB wrote:I will submit dumps, just getting used to C64 dumping! When dumping for submission, should I dump all disks using the flippy mode parameters even if the disk only uses 1 side?
Yes. Always both sides of the disk.

Try c64 dumping script if you like as it helps to produce correct info files and folder structure. Script is not required at all but it may help with bigger amount of the disks.
viewtopic.php?f=10&t=53#p6657

BarryB
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Re: C64 dumping

Post by BarryB » Wed Apr 23, 2014 9:56 pm

Thanks Rakki, will try out your dump script when I'm ready to create proper dumps for submission. I modified the SPS script for dumping my PC 3.5" disks so you've saved me a job :D

BarryB
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Re: C64 dumping

Post by BarryB » Sat Apr 26, 2014 12:48 pm

One other question, are C64 copy protections unique to each disk?

The reason I ask is this, found some G64 files to test but they didn't have mastering info but DTC wrote the disk anyway, it started loading on my C64 but then stopped. Checked the G64 in Winvice and it's stuck on track 35.5 so looks to be XEMAG, obviously they have not copied this in the G64. So I dumped the disk to get some stream files, copied tracks 68.0, 69.0 and 70.0 from my Koronis Rift dump which is XEMAG protected, renamed the tracks and overwrote the dumped ones and created a new G64 with XEMAG. Surprisingly, the game now loads in Winvice and when wrote back to disk now loads on my C64/1541!! This really surprised me as I wasn't expecting it to work!! Is there any game specific info contained in the XEMAG tracks or is just protection info that happened to work for this title and I was just 'lucky'?

I've also had success with converting D64 files to G64 using nibconv and writing back with DTC, even though it complains and doesn't verify but the disks work fine! Found the insomnia demo in G64, but still not a 'proper' G64, but still wrote back and played fine on my C64, both disks ran all the way to the end of the demo! Also managed to use Fast Hack'Em to copy the second disk of that demo onto side 1 of the first so it's now on 1 disk, ran it again and it plays fine all the way to the end including the disk flip. Also think this demo will test the VSP bug, but seeing as my C64 played it without any problems I guess my C64 seems OK.

Have now breathed a new lease of life into my C64 now I know I can 'hack' writing D64 files to disk :D

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IFW
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Re: C64 dumping

Post by IFW » Sat Apr 26, 2014 5:30 pm

It really depends on the protection type...
In the case of XEMAG replicating the track content should be enough. Copying from another disk may work as well, but I've seen a few disks where the content was different from the usual pattern in those 3 tracks.

BarryB
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Re: C64 dumping

Post by BarryB » Sun Apr 27, 2014 8:00 pm

I'll treat that one as 'luck' then! I can experiment if other disk images seem to have missing protection, but I won't expect it to work!

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